1NDC:
reference: X-ray structure of nucleoside diphosphate kinase complexed with thymidine diphosphate and Mg2+ at 2-A resolution., Cherfils J, Morera S, Lascu I, Veron M, Janin J, Biochemistry 1994 Aug 9;33(31):9062-9. PMID: 8049207

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